Segui questo link per vedere altri tipi di pubblicazioni sul tema: Tellurium.

Tesi sul tema "Tellurium"

Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili

Scegli il tipo di fonte:

Vedi i top-50 saggi (tesi di laurea o di dottorato) per l'attività di ricerca sul tema "Tellurium".

Accanto a ogni fonte nell'elenco di riferimenti c'è un pulsante "Aggiungi alla bibliografia". Premilo e genereremo automaticamente la citazione bibliografica dell'opera scelta nello stile citazionale di cui hai bisogno: APA, MLA, Harvard, Chicago, Vancouver ecc.

Puoi anche scaricare il testo completo della pubblicazione scientifica nel formato .pdf e leggere online l'abstract (il sommario) dell'opera se è presente nei metadati.

Vedi le tesi di molte aree scientifiche e compila una bibliografia corretta.

1

Rooms, John Frederick. "A matrix isolation investigation of tellurium crochemistry using hydrogen telluride and tellurium dimers as precursors." Thesis, University of Hull, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419789.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Pathirana, Hema M. K. K. "Ligand chemistry of tellurium." Thesis, Aston University, 1985. http://publications.aston.ac.uk/14516/.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

West, Anthony A. "Structural studies in tellurium chemistry." Thesis, Aston University, 1989. http://publications.aston.ac.uk/9705/.

Testo completo
Abstract (sommario):
The primary theme of this research was the characterisation of new and novel organo-tellurium complexes, using the technique of single crystal X-ray analysis to establish more firmly the various coordination modes of tellurium. In each study the unit cell dimensions and intensity data were collected using an Enraf-Nonius CAD-4, four circle diffractometer. The raw data collected in turn was transferred to the Birmingham University Honeywell Multics System and processed using the appropriate computer packages for the determination of crystal structures. The molecular and crystal structures of: b
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Swan, R. "Experimental studies of thin tellurium films." Thesis, London South Bank University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.618631.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Swan, Ronnie. "Experimental studies of thin tellurium films." Thesis, London South Bank University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316966.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Espinosa, Ortiz Erika. "Bioreduction of selenite and tellurite by Phanerochaete chrysosporium." Thesis, Paris Est, 2015. http://www.theses.fr/2015PESC1193/document.

Testo completo
Abstract (sommario):
Le sélénium et le tellurium partagent des propriétés chimiques communes et appartiennent à la colonne des éléments chalcogènes de la classification périodique des éléments. Ces métalloïdes ont des propriétés physico-chimiques remarquables et ils ont été utilisés dans un grand nombre d'applications dans le domaine des hautes technologies (électronique, semi-conducteurs, alliages). Ces éléments, qui se retrouvent généralement sous formes d'oxyanions, sont extrêmement solubles dans l'eau et présentent une forte toxicité. Leur libération dans l'environnement est donc d'un enjeu capital. Différente
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Bates, C. M. "Pentamethylcyclopentadienyl (Cp*) compounds of selenium and tellurium." Thesis, Swansea University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636056.

Testo completo
Abstract (sommario):
Successful preparations were: (<B>1</B>) bis(pentamethylcyclopentadienyl)selenium, prepared by the reaction of selenium diethydithiocarbamate with lithiated pentamethylcyclopentadiene; (<B>2</B>) Cp*Se<SUB>n</SUB>Li (n = 2,3,4), prepared by the reaction of elemental selenium with lithiated pentamethylcyclopentadiene in THF and its subsequent reaction with iodomethane to produce (<B>3</B>) methyl(pentamethylcyclopentadienyl)selenium or water to produce the polyselenide mixture (<B>4</B>) Cp*<SUB>2</SUB>Se<SUB>n</SUB> (n = 2,3,4). (<B>4</B>) was also produced by the low temperature reaction of s
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Conibeer, Gavin John. "Zinc diffusion in tellurium doped gallium antimonide." Thesis, University of Southampton, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262103.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Abid, K. Y. "Synthetic approaches to organoselenium and tellurium semiconductors." Thesis, Aston University, 1987. http://publications.aston.ac.uk/9723/.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Ahmed, Mohammed A. K. "Synthesis and physical investigation of tellurium dithiocarbamates." Thesis, Aston University, 1985. http://publications.aston.ac.uk/11726/.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
11

Abbott, Jonathan D. "Carbon Coated Tellurium for Optical Data Storage." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/2360.

Testo completo
Abstract (sommario):
A highly durable optical disk has been developed for data archiving. This optical disk uses tellurium as the write layer and carbon as a dielectric and oxidation prevention layer. The sandwich style CTeC film was deposited on polycarbonate and silicon substrates by plasma sputtering. These films were then characterized with SEM, TEM, EELS, ellipsometry, ToF-SIMS, etc, and were tested for writability and longevity. Results show the films were uniform in physical structure, are stable, and able to form permanent pits. Data was written to a disk and successfully read back in a commercial DVD driv
Gli stili APA, Harvard, Vancouver, ISO e altri
12

Chau, Hei. "Synthesis and properties of tellurium-containing long chain fatty acid derivatives /." [Hong Kong : University of Hong Kong], 1993. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13554566.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
13

Mullins, J. T. "Properties of Tellurium-based II-VI semiconducting materials." Thesis, Durham University, 1990. http://etheses.dur.ac.uk/6004/.

Testo completo
Abstract (sommario):
Opto-electronic devices operating as radiation detectors in the infra-red region of the electromagnetic spectrum are currently of interest. By operating in the infra-red, particularly in the 8-12 µm wavelength range, it is possible to detect the infra-red radiation emitted by objects at ordinary temperatures and so to image in darkness. Furthermore, at such wavelengths, vision is also possible in mist, fog or smoke. Semiconducting materials which have an energy gap corresponding to the photon energy of the radiation of interest are suitable for fabricating such devices. The growth and characte
Gli stili APA, Harvard, Vancouver, ISO e altri
14

Bello, Yusuf O. "Tellurium and selenium precipitation from copper sulphate solutions." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/95895.

Testo completo
Abstract (sommario):
Thesis (MEng) -- Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: The copper sulphate leach solutions produced during the final pressure leach stages in base metal refinery processes contain low concentrations of other precious metals (OPMs, namely Rh, Ru and Ir ) and impurities in addition to the base metals (BMs) of interest. Se and Te impurities, in particular, must be removed from the leach solution before it is fed to copper electrowinning because these species have adverse effects on electrowinning efficiency. Currently, these elements are being precipitated from the leach solution w
Gli stili APA, Harvard, Vancouver, ISO e altri
15

Poon, Jia-fei. "Exploring Catalytic Tellurium-Based Antioxidants : Synthesis and Evaluation." Doctoral thesis, Uppsala universitet, Organisk kemi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-302475.

Testo completo
Abstract (sommario):
This thesis is concerned with the synthesis and evaluation of various tellurium-based chain-breaking antioxidants. The purpose is to find novel regenerable compounds with improved radical-trapping capacity. In the first part of this work, we explore the possibilities to incorporate tellurium into tocopherols and aromatic amines. Overall, tocopherols carrying alkyltelluro groups are better radical-trapping agents than the corresponding sulfur- and selenium analogues. Among them, 7-octyltelluro δ-tocopherol showed a ca. 17-fold higher reactivity than recorded for α-tocopherol and much better reg
Gli stili APA, Harvard, Vancouver, ISO e altri
16

Hall, Bradley Devin. "Powder processing, powder characterization, and mechanical properties of LAST (lead-antimony-silver-tellurium) and LASTT (lead-antimony-silver-tellurium-tin) thermoelectric materials." Diss., Connect to online resource - MSU authorized users, 2008.

Cerca il testo completo
Abstract (sommario):
Thesis (M.S.)--Michigan State University. Materials Science and Engineering, 2008.<br>Title from PDF t.p. (viewed on Aug. 7, 2009) Includes bibliographical references (p. 151-159). Also issued in print.
Gli stili APA, Harvard, Vancouver, ISO e altri
17

MESTNIK, SONIA A. C. "Separacao do Mo-99 do Te-132 usando tioureia como agente complexante .Aplicacao a separacao do Mo-99 dos produtos de fissao." reponame:Repositório Institucional do IPEN, 1987. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9881.

Testo completo
Abstract (sommario):
Made available in DSpace on 2014-10-09T12:32:25Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:10:31Z (GMT). No. of bitstreams: 1 03134.pdf: 2064767 bytes, checksum: 2ee561f5c7d60b299f3f1a26c7b85831 (MD5)<br>Tese(Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
Gli stili APA, Harvard, Vancouver, ISO e altri
18

Aucoin, Sandblom Nicole Therese. "Experimental and theoretical studies of multiply bonded tellurium compounds." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0015/NQ47912.pdf.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
19

Elaseer, Abdusalam S. "Transmethylation of selenium and tellurium : analytical and environmental aspects." Thesis, University of Bristol, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240775.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
20

Wilhelm, Allison Anne. "Tellurium Based Glasses for Bio-Sensing and Space Applications." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/195158.

Testo completo
Abstract (sommario):
Te2As3Se5 (TAS) fibers are often used in bio-sensing applications requiring direct contact between the fiber and live cells. However, the toxicity and stability of chalcogenide glasses typically used in such bio-sensing applications are not well known. The stability and toxicity of TAS glass fibers were therefore examined. The surface of TAS fibers stored for up to three years in air were analyzed using X-ray photoelectron spectroscopy (XPS), inductively coupled plasma mass spectrometry (ICP-MS), and atomic force microscopy (AFM). It is shown that an oxide layer develops on the surface of TAS
Gli stili APA, Harvard, Vancouver, ISO e altri
21

周晞 and Hei Chau. "Synthesis and properties of tellurium-containing long chain fatty acidderivatives." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1993. http://hub.hku.hk/bib/B31233478.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
22

Badaye, Massoud. "Fabrication and investigation of tellurium thin film CO2 laser detectors." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61901.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
23

Nwambaekwe, Kelechi Chiemezie. "Tellurium attenuation of kesterite band-gap for improved photovoltaic efficiency." University of the Western Cape, 2019. http://hdl.handle.net/11394/6656.

Testo completo
Abstract (sommario):
>Magister Scientiae - MSc<br>Tellurium is a member of the chalcogen group in the periodic table and is known to be a better semiconductor material when compared to sulfur and selenium. By introducing tellurium into the kesterite structure there would be an improvement in the semiconducting property of the kesterite material. This research focused on incorporating tellurium into kesterite structure in order to reduce its band-gap thereby improving its light absorption and ultimately lead to a more efficient photovoltaic effect. For a typical synthesis, kesterite nanoparticles were synthesized b
Gli stili APA, Harvard, Vancouver, ISO e altri
24

Mbogo, S. A. "The co-ordination chemistry of tellurium and related selenium ligands." Thesis, Aston University, 1990. http://publications.aston.ac.uk/25359/.

Testo completo
Abstract (sommario):
2-(2-pyridyl)phenyl(p-ethoxyphenyl)tellurium(II), (RR1Te) reacts with HgCl2 at room temperature to give white HgCl2.RR1Te. On setting aside, or on warming the reaction mixture a yellow material, [R1HgCl.(RTeCl)2] is formed. Multinuclear NMR(125Te, 199Hg, 1H) and mass spectroscopy confirm the formulation, and confirm the ease of transfer of the p-ethoxyphenyl group (R1) between the metal centres. The crystal structure of the yellow material consists of two discrete RTeCl molecules together with a R1HgCl molecule. There is no dative bond formation between these species, hence the preferred descr
Gli stili APA, Harvard, Vancouver, ISO e altri
25

Al-Salim, Najih I. "The synthesis and properties of some novel tellurium-containing ligands." Thesis, Aston University, 1987. http://publications.aston.ac.uk/14522/.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
26

Johnston, Murray. "Thermodynamics of selenium and tellurium in molten metallurgical slags and alloys." University of Western Australia. School of Biomedical, Biomolecular and Chemical Sciences, 2007. http://theses.library.uwa.edu.au/adt-WU2008.0064.

Testo completo
Abstract (sommario):
There are a number of impurity elements present in sulphide ores that can have a deleterious effect on the properties of the final copper metal product. In this thesis, an equilibrium distribution technique was used to determine the thermodynamic behaviour of selenium and tellurium in molten slags used in copper production. Calcium ferrite based slags and copper or silver alloy were equilibrated in magnesia crucibles at temperatures of 1200 to 1400 °C and oxygen partial pressures of 10-11 to 10-0.68 atm. Under conditions typical of those employed during copper converting, the minor elements we
Gli stili APA, Harvard, Vancouver, ISO e altri
27

Landvogt, Christian Rudolf [Verfasser]. "Gold-Tellurium Clusters and Tetrachloridoaurates with Divalent Cations / Christian Rudolf Landvogt." Bonn : Universitäts- und Landesbibliothek Bonn, 2017. http://d-nb.info/1159955131/34.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
28

Richards, Martyn W. "Chemical reactions of caesium, tellurium and oxygen with transition metal alloys." Thesis, University of Nottingham, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.276201.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
29

Ma, Yi. "Thermoelectric Properties of P-Type Nanostructured Bismuth Antimony Tellurium Alloyed Materials." Thesis, Boston College, 2009.

Cerca il testo completo
Abstract (sommario):
Thesis advisor: Zhifeng Ren<br>Solid-state cooling and power generation based on thermoelectric effects are attractive for a wide range of applications in power generation, waste heat recovery, air-conditioning, and refrigeration. There have been persistent efforts on improving the figure of merit (ZT) since the 1950's; only incremental gains were achieved in increasing ZT, with the (Bi1-xSbx)2(Se1-yTey)3 alloy family remaining the best commercial material with ZT ~ 1. To improve ZT to a higher value, we have been pursuing an approach based on random nanostructures and the idea that the therma
Gli stili APA, Harvard, Vancouver, ISO e altri
30

Hesford, Matthew James. "Synthesis and coordination chemistry of acyclic and macrocyclic tellurium-containing ligands." Thesis, University of Southampton, 2003. https://eprints.soton.ac.uk/361577/.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
31

Moffett, Christina. "Characterization of Tellurium Back Contact Layer for CdTe Thin Film Devices." Thesis, Colorado State University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10826197.

Testo completo
Abstract (sommario):
<p> Cadmium Telluride (CdTe) thin film photovoltaic technology has shown favorable progress due to inexpensive and efficient processing techniques. However, efficiencies have yet to reach the overall projected CdTe device efficiency, with the back contact being a main source of CdTe performance limitations. Tellurium (Te) applied as a back contact has led to significant increases in fill factor and an overall progress in device efficiency. Devices deposited with Te show significant improvement in uniformity, even without intentional Cu doping, when compared to devices without Te. In current -
Gli stili APA, Harvard, Vancouver, ISO e altri
32

Culshaw, Peter Norman. "Generation and reactivity of carbon, sulphur and tellurium centred free radicals." Thesis, University of St Andrews, 1991. http://hdl.handle.net/10023/14841.

Testo completo
Abstract (sommario):
Using ESR dimer-radical equilibrium techniques the heat of formation, △Hf0, of the pentamethylcyclopentadienyl radical was determined as 7.4 kcal mol−1, and hence SEMeH was calculated to be 37.9 kcal mol−1. It was attempted to determine △Hf0 for the pentaethyl- and pentamethoxycarbonylcyclopentadienyl radicals, but this proved unsuccessful. From appearance energy measurements, △Hf0 (Pentadienyl) was determined to be 49.6 kcal mol−1 Using photoacoustic calorimetry, the C3-H bond dissociation energy of penta−1,4-diene and several 3-substituted pentadienes were determined; i.e. for penta−1,4-dien
Gli stili APA, Harvard, Vancouver, ISO e altri
33

Silva, Robson Rosa da [UNESP]. "Estudo da preparação de nanocompósitos magneto-luminescentes unidimensionais baseados em telúrio." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/97932.

Testo completo
Abstract (sommario):
Made available in DSpace on 2014-06-11T19:29:10Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-03-15Bitstream added on 2014-06-13T20:38:23Z : No. of bitstreams: 1 silva_rr_me_araiq.pdf: 6153824 bytes, checksum: 99fdc68a43b515fbf9a4f98f2d7ce84b (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Este trabalho baseou-se no estudo da preparação de novos nanomateriais multifuncionais baseados em nanoestruturas 1D de telúrio (Te1D), as quais foram obtidas pela redução de óxido de telúrio através da síntese por modelagem assistida de protetores de colóide. Os pr
Gli stili APA, Harvard, Vancouver, ISO e altri
34

Brown, Daniel Edward. "Low temperature nuclear orientation studies of nuclei far from stability." Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.257942.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
35

Alzahrani, Ali. "DETERMINATION AND SPECIATION OF TELLURIUM IN ENVIRONMENTAL SAMPLES USING HYDRIDE GENERATION ATOMIC FLUORESCENCE SPECTROSCOPY (HG-AFS)." Thesis, Laurentian University of Sudbury, 2014. https://zone.biblio.laurentian.ca/dspace/handle/10219/2133.

Testo completo
Abstract (sommario):
This thesis focuses on developing a new method to measure trace tellurium (Te) in different environmental samples such as lake waters, mine tailings and sediments. The developed technique is based on Hydride Generation Atomic Fluorescence Spectroscopy (HG-AFS), a technique that can measure low concentration of Te and also allows for Te speciation at low cost and high efficiency in various environmental samples. To validate the method that could be used to determine Te speciation in various types of environmental samples, a series of tests has been designed for finding the best conditions to me
Gli stili APA, Harvard, Vancouver, ISO e altri
36

Silva, Robson Rosa da. "Estudo da preparação de nanocompósitos magneto-luminescentes unidimensionais baseados em telúrio /." Araraquara, 2012. http://hdl.handle.net/11449/97932.

Testo completo
Abstract (sommario):
Orientador: Sidney José Lima Ribeiro<br>Banca: Osvaldo Novais de Oliveira Junior<br>Banca: Cid Bartolomeu de Araujo<br>Resumo: Este trabalho baseou-se no estudo da preparação de novos nanomateriais multifuncionais baseados em nanoestruturas 1D de telúrio (Te1D), as quais foram obtidas pela redução de óxido de telúrio através da síntese por modelagem assistida de protetores de colóide. Os protetores de colóide utilizados foram baseados em surfactantes iônicos e não iônicos, copolímeros em blocos ou carboidratos de cadeias lineares. Nanoestruturas de Te1D na forma de filamentos ou fios longos e
Gli stili APA, Harvard, Vancouver, ISO e altri
37

Kalb, Johannes Andreas. "Crystallization kinetics in antimony and tellurium alloys used for phase change recording." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=979086299.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
38

Rai, Vidisha. "An ab initio study of electronic states and transitions of tellurium monohalides." [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=968337449.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
39

Sheng, Jia. "Synthesis, Structure and Function Studies of Selenium and Tellurium Derivatized Nucleic Acids." Digital Archive @ GSU, 2009. http://digitalarchive.gsu.edu/chemistry_diss/30.

Testo completo
Abstract (sommario):
Nucleic acids play important roles in living systems by storing and transferring genetic information and directing protein synthesis. Recently, it was found that nucleic acids can catalyze chemical and biochemical reactions similar to protein enzymes. In addition, they can also serve as drug targets for the treatment of deadly diseases such as AIDS and cancers. As a result, the 3D structure study of nucleic acids and proteinnucleic acids complexes by X-ray crystallography has become one of the most active research areas. However, the two intrinsic bottlenecks of macromolecule X-ray crystallogr
Gli stili APA, Harvard, Vancouver, ISO e altri
40

Burgess, M. R. "Synthetic, spectroscopic, structural and electrochemical studies on selenium- and tellurium-substituted ferrocenes." Thesis, Swansea University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636180.

Testo completo
Abstract (sommario):
This work is divided into seven chapters. Chapter one contains a brief introduction to the chemistry of ferrocene, selenium and tellurium, together with an outline of relevant electrochemical techniques. Chapter two introduces <SUP>77 </SUP>Se and <SUP>125</SUP> Te NMR spectroscopy, and contains a discussion of the electrochemistry and multinuclear NMR spectroscopy of diferrocenyl diselenide and diferrocenyl ditelluride. The molecular structure of the latter has been determined and is also described and related to its electrochemical behaviour. Chapter three contains the results of multinuclea
Gli stili APA, Harvard, Vancouver, ISO e altri
41

Yates, Carol Ann. "An investigation into adduct formation between dialkyl tellurium and dialkyl cadmium compounds." Thesis, University of Reading, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292770.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
42

Girkin, J. M. "Development of a tellurium frequency standard for laser spectroscopy of atomic hydrogen." Thesis, University of Southampton, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382167.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
43

Podchezertsev, Stanislav. "Magnetoelectric coupling in cobalt-based tellurium (VI) oxides with complex spin structures." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMC228.

Testo completo
Abstract (sommario):
La thèse actuelle est consacrée à une étude complexe de diffusion de neutrons sur des séries de spinelles de tellure à base de cobalt (VI) dopées au zinc. Il a été constaté que le composé parent peut être obtenu sous deux formes structurelles: centrosymétrique désordonnée (groupe d'espace # 227) et non-centrosymétrique ordonnée (groupe d'espace # 212). Alors que le polymorphe désordonné soit un ferrimagnet typique de type Néel avec une transition magnétique à 40 K, le polymorphe ordonné possède deux transitions de phase magnétiques incommensurables à 45 K et 27 K. Grâce à l'approche de symétri
Gli stili APA, Harvard, Vancouver, ISO e altri
44

Lizárraga, Olivares Kevin Angello. "Excitons in monolayer tellurium studied with QPMBPT and a hydrogen-like model /." São Paulo, 2019. http://hdl.handle.net/11449/183101.

Testo completo
Abstract (sommario):
Orientador: Alexandre Reily Rocha<br>Resumo: Os excitons desempenham um papel fundamental em aplicações fotovoltaicas (FV). Atualmente, a tecnologia FV de filme fino possui 9% da produção mundial. Em particular, o telúrio foi ligado ao cádmio (Cd-Te) e utilizado no fabrico de células solares de película fina. No entanto, a tecnologia de telúrio pode ser melhorada se estruturas de menor dimensão forem usadas, por exemplo, a forma de monocamada conhecida como telureno. O telureno pode ser sintetizado com sucesso em um substrato (por exemplo, grafeno), tem alta mobilidade dos portadores, a condut
Gli stili APA, Harvard, Vancouver, ISO e altri
45

Kennard, David R. "The chemistry of the corrosion of transition metals by caesium, tellurium and oxygen." Thesis, University of Nottingham, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357966.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
46

Nordheider, Andreas. "Phosphorus-tellurium heterocycles and their lighter chalcogen analogues : from small rings to macrocycles." Thesis, University of St Andrews, 2014. http://hdl.handle.net/10023/5546.

Testo completo
Abstract (sommario):
The research on phosphorus-chalcogen compounds enjoys a long tradition in the field of inorganic chemistry, which has led to applications such as strike-anywhere matches, precursors for metal chalcogenide thin films and versatile reagents in organic synthesis. Whereas a wide range of phosphorus-sulfur and -selenium systems is known, the literature lacks information about compounds incorporating phosphorus-tellurium bonds. This thesis describes fundamental studies that develop the basic understanding of the synthesis of phosphorus-tellurium systems and the structural characteristics of these sp
Gli stili APA, Harvard, Vancouver, ISO e altri
47

Majeed, Zulfiqar. "The reactions of directly related tellurium and selenium heterocyclic compounds with triiron dodecacarbonyl." Thesis, Aston University, 1999. http://publications.aston.ac.uk/9622/.

Testo completo
Abstract (sommario):
The reactions of directly related tellurium and selenium heterocyclic compounds with triiron dodecacarbonyl are described. The reaction of 2-telluraphthalide, C8H8OTe with [Fe3(CO)12 gave [Fe{C6H4(CH2)Te}(CO)3]2, (1). An iron atom has inserted into the telluracyclic ring, and it is probable that one co-ordinated CO ligand arises from the initially organic carbonyl group. X-ray analysis of compound (1) showed that the compound has a Fe2Te2 core, which is achieved by dimerisation. The reaction of telluraphthalic anhydride, C8H402Te with [Fe3(CO)12] gave a known, but unexpected, organic phthalide
Gli stili APA, Harvard, Vancouver, ISO e altri
48

Khan, Rana. "Structural studies of halogen, interhalogen and pseudohalogen compounds of phosphorus, selenium and tellurium." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/structural-studies-of-halogen-interhalogen-and-pseudohalogen-compounds-of-phosphorus-selenium-and-tellurium(b1ba6ec9-198c-4de5-be73-f136a4db3ee0).html.

Testo completo
Abstract (sommario):
A series of compounds with the general formula R3PX2 and R3PX4 (where R = o-tolyl, m-tolyl, p-tolyl, o-anisyl, m-anisyl, p-anisyl, o-thioanisyl, p-thioanisyl, p-fluorophenyl, p-chlorophenyl, mesityl and X = Cl, Br, I) have been synthesised and studied by X-ray crystallography, multinuclear NMR spectroscopy and Raman spectroscopy. A study of the conformational features of the aryl groups in these structures was undertaken in order to investigate the role of steric effects and crystal packing on P-X and X-X bond lengths. Compounds with the general formula RSeX / RSeX3 (where R = p-fluorophenyl,
Gli stili APA, Harvard, Vancouver, ISO e altri
49

Yildirim, Emrah. "Tellurium Speciation Using Hydride Generation Atomic Absorption Spectrometry And In-situ Graphite Cuvette Trapping." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12610967/index.pdf.

Testo completo
Abstract (sommario):
In recent years speciation analysis is becoming more important as it is known that each chemical form of an element behaves differently in biological and environmental media. Since abundance of tellurium in earth crust is extremely low, very sensitive and accurate methods are needed to determine the concentration of tellurium. Hydride generation atomic absorption is a sensitive, fast and economical technique applied for the determination of tellurium. Speciation of tellurium can be achieved by making use of different kinetic behaviors of Te(IV) and Te(VI) upon its reaction with sodiumborohydri
Gli stili APA, Harvard, Vancouver, ISO e altri
50

Allen, Matthew David. "The oxidation and ammoxidation of propene using mixed oxides of iron, antimony and tellurium." Thesis, University of Liverpool, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385111.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Offriamo sconti su tutti i piani premium per gli autori le cui opere sono incluse in raccolte letterarie tematiche. Contattaci per ottenere un codice promozionale unico!